My experience is if you want a six foot snake, no matter what you do, you will end up with a monster. If you wanted a monster sized snake, you will end up with a six footer. Boas sizes are so unpredictable that you really shouldn't worry about it. Go with the locale that you like and just feed it and take care of it right. You won't be disappointed in any way. A six foot boa isn't much more of a chore than a eight foot boa. I my opinion, the varients are comparable. From 6-8 foot there really isn't too much more of a hassle anywhere to even be said. 8-10, 10-12, the same thing. It's when you get into the Burms and retics sizes that you need to worry, but then you should know that before hand, rightio? My eight foot boas are not any more of a hassle or problem than my six foot boas in any way. The BCI is a heavy snake regardless, and they know it and are usually much more gentle once they reach that size anyways. I would trust my large Boas with anyone over the smaller ones any day of the week. They know they are strong and large and are calmer and less apt to squeeze or strike when they are full size. Just my .02cents though. Good luck!